EP0466784A1 - Former for use in the manufacture of fibreglass articles. - Google Patents

Former for use in the manufacture of fibreglass articles.

Info

Publication number
EP0466784A1
EP0466784A1 EP90906063A EP90906063A EP0466784A1 EP 0466784 A1 EP0466784 A1 EP 0466784A1 EP 90906063 A EP90906063 A EP 90906063A EP 90906063 A EP90906063 A EP 90906063A EP 0466784 A1 EP0466784 A1 EP 0466784A1
Authority
EP
European Patent Office
Prior art keywords
former
sheet
holes
article
depressions
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP90906063A
Other languages
German (de)
French (fr)
Other versions
EP0466784B1 (en
EP0466784A4 (en
Inventor
Desmond Harold Bleasdale
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Desglo Pty Ltd
Original Assignee
Desglo Pty Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Desglo Pty Ltd filed Critical Desglo Pty Ltd
Priority claimed from PCT/AU1990/000237 external-priority patent/WO1990014938A1/en
Publication of EP0466784A1 publication Critical patent/EP0466784A1/en
Publication of EP0466784A4 publication Critical patent/EP0466784A4/en
Application granted granted Critical
Publication of EP0466784B1 publication Critical patent/EP0466784B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C33/00—Moulds or cores; Details thereof or accessories therefor
    • B29C33/0011—Moulds or cores; Details thereof or accessories therefor thin-walled moulds
    • B29C33/0016—Lost moulds, e.g. staying on the moulded object
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C33/00—Moulds or cores; Details thereof or accessories therefor
    • B29C33/42—Moulds or cores; Details thereof or accessories therefor characterised by the shape of the moulding surface, e.g. ribs or grooves
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
    • B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
    • B29C70/28—Shaping operations therefor
    • B29C70/30—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D24/00—Producing articles with hollow walls
    • B29D24/002—Producing articles with hollow walls formed with structures, e.g. cores placed between two plates or sheets, e.g. partially filled
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
    • Y10T428/24273—Structurally defined web or sheet [e.g., overall dimension, etc.] including aperture
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
    • Y10T428/24273—Structurally defined web or sheet [e.g., overall dimension, etc.] including aperture
    • Y10T428/24322—Composite web or sheet
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
    • Y10T428/24479—Structurally defined web or sheet [e.g., overall dimension, etc.] including variation in thickness
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
    • Y10T428/24479—Structurally defined web or sheet [e.g., overall dimension, etc.] including variation in thickness
    • Y10T428/2457—Parallel ribs and/or grooves
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
    • Y10T428/24628—Nonplanar uniform thickness material
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
    • Y10T428/24628—Nonplanar uniform thickness material
    • Y10T428/24669—Aligned or parallel nonplanarities
    • Y10T428/24686—Pleats or otherwise parallel adjacent folds

Definitions

  • TITLE FORMER FOR USE IN THE MANUFACTURE OF FIBREGLASS ARTICLES
  • the present invention relates to the formation of such stiffening ribs in particular to the formation of hollow stiffening ribs composed of a hard setting synthetic plastics material such as polyester resins, epoxy resins, vinyl esters or the like, preferably with reinforcing fibres, for example, glass, carbon, plastic or natural fibres, embedded in the resinous or plastics material.
  • a hard setting synthetic plastics material such as polyester resins, epoxy resins, vinyl esters or the like, preferably with reinforcing fibres, for example, glass, carbon, plastic or natural fibres, embedded in the resinous or plastics material.
  • Articles of fibre reinforced plastics material may be made by "laying up”, that is to say by placing a layer of woven or non-woven reinforcing fibres upon a mould surface and then painting or impregnating that layer with the hard-setting plastics material while in a liquid or pasty state and subsequently allowing or causing the plastics to set.
  • a mixture of unset resin and short fibres may be applied to the mould surface in one operation.
  • hollow stiffening ribs of the kind under discussion have been made by applying bulky, low strength, ropes of paper, wooden slats or other cheap former elements, to one side of a sheet-like article or article portion and subsequently covering those elements with a layer of the settable rib material which sets and becomes bonded to the main body of the sheet intermediate the elements, but is held away from the main body by the elements so constituting filled or hollow ribs.
  • a former comprising a foraminous sheet in which the areas between adjacent holes comprise a grid of spaced apart, arch-sectioned longitudinal members and spaced-apart, arch-sectioned transverse members and said members being integrally united at the respective intersection points.
  • the present invention seeks to overcome or at least ameliorate these disadvantages by providing a former which is flexible and can be made from thin light material that will maintain its designed shape whilst contorting to a simple or compound curve.
  • the present invention provides a former adapted to support the layer of settable plastics material while it sets into hollow reinforcing ribs bonded to a laid up article of fibre reinforced plastics material during manufacture of said article comprising a foraminous sheet wherein the region of the sheet between each pair of neighbouring holes is elevated above the plane in which the rims of the holes are disposed by means of one or more upstanding formations joined to one another by a flexible web.
  • the upstanding formations are provided with generally level lands lying parallel to the plane of the sheet.
  • the upstanding formations are joined at their bases but may be connected at any level between the formations.
  • said land is provided with a rigidifying formation.
  • the rigidifying formation comprises one or more depressions or patterns of depressions formed in the surface of said land, said depressions arranged to resist flexing of the land transverse thereto.
  • Figure 1 is a plan view of a former according to one embodiment of the invention.
  • Figure 2 is a section view taken on line 2 -2 of Figure 1;
  • Figure 3 is a section view taken on 3 - 3 of Figure 1;
  • Figure 4 is an enlarged section view, similar to Figure 2, with the fibreglass laid up;
  • Figure 5 is an enlarged section view, similar to Figure 3, with the fibreglass laid up;
  • Figure 6 is an enlarged section view, similar to Figure 5, with the further planar layer of fibreglass applied to a form a sheet;
  • Figure 7 is a plan view of the filler element shown in Figure 6; and .
  • Figure 8 is a perspective view of the former of Figure 1, illustrating the ability to assume complex curves. DESCRIPTION OF PREFERRED EMBODIMENTS
  • the former according to this embodiment a foraminous sheet 5 formed from an inexpensive mouldable material such as paper mache, fibreglass or plastics material.
  • the former is converted from a sheet 5 of plastics or film material.
  • the sheet 5 is pierced by a plurality of holes 6 arranged in an orderly array of intersecting rows and the material of the sheet 5 is formed into a one or more upstanding formations 7 having substantially planar upper surfaces forming lands 8.
  • Each formation 7 is joined to adjacent formations at their bases 9 by a flexible web 10.
  • the lands 8 are rigidified by a pattern of depressions or grooves 11 formed in the surface of the sheet.
  • the grooves 11 have been found to resist transverse bending or flexing and thus effectively rigidify the lands 8 while still allowing the former to assume complex forming shapes as best shown in Figure 8.
  • the patterns applied to the lands are preferably symmetrical and repeated so to allow for nesting and overlapping of sheets. This assists in joining fixed sized sheets into any sized sheet required.
  • the former sheets may be overlapped at the edges by nesting one row of formations 7 within the upstanding formations on the mating edge of a further sheet.
  • the sheets may equally be merely abutted edge to edge and the laying up process used to form a permanent joint.
  • sheet 15 which may be of any suitable material, including fibre reinforced synthetic resin, with the rims of the holes 6 in contact with the sheet 15 and the upstanding formations 7 projecting upwardly therefrom.
  • a layer of fibre reinforced synthetic resin 16 may then be applied to the exposed surface so as to contact and bond with the sheet 15 through the holes 6. Once these parts of layer 16 which are supported by the formations 7 set, they constitute stiffening ribs on the original sheet 15.
  • the provision of flexible webs 10 enables the former to be bent as required to follow the curved surface. (See figure 8).
  • the plastics layers supported or formed on the former according to the invention may also be sandwiched between the sheet 15 and a further sheet 17 as shown in figure 6 to constitute a light weight, rigidifying filling or core for composite panel structures or the like.
  • This further sheet 17 may be preformed of fibre glass reinforced plastic or other sheet material and bonded to sheet 16 prior to sheet 16 becoming set or post laying up sheet 17 in the conventional manner.
  • a filler element 18 may be placed into the depression so as to support the sheet 17.
  • the filler element 18 is of stool-like construction, however, any suitable filling element may be used.
  • the filler element of this embodiment may be formed during production of the sheet of the intended location of the holes 6. When the holes are cut out the the filling element is removed. This procedure avoids any unnecessary wastage of material.
  • the stool element 19 may be provided with a flat lid 20 which sits on the top of the stool element prevent entry of material into the hollow legs 21 of the stool element.
  • the holes in the foraminous sheet may be irregularly or randomly disposed and may be of differing shapes and/or sizes.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Composite Materials (AREA)
  • Laminated Bodies (AREA)
  • Moulding By Coating Moulds (AREA)
  • Glass Compositions (AREA)

Abstract

Le gabarit décrit sert à soutenir une couche d'un matériau plastique durcissable, pendant que celui-ci durcit pour former des nervures de renforcement creuses agglomérées à un article, obtenu par drapage, en matériau plastique renforcé par des fibres, pendant la fabrication dudit article. Le gabarit comprend une feuille foraminée (5), dont la région comprise entre chaque paire de trous voisins (6) est surélevée par rapport au plan dans lequel sont situés les bords des trous, au moyen d'un ou de plusieurs bossages saillants (7) joints entre eux par une membrane flexible (10). Des motifs rigidifiants (11) sont formés sur les bossages saillants. Un article produit au moyen d'un tel gabarit est également décrit.The template described serves to support a layer of a curable plastic material, while the latter hardens to form hollow reinforcing ribs agglomerated with an article, obtained by draping, made of fiber-reinforced plastic material, during the manufacture of said article. . The template comprises a foraminous sheet (5), the region of which between each pair of neighboring holes (6) is raised relative to the plane in which the edges of the holes are located, by means of one or more projecting bosses (7 ) joined together by a flexible membrane (10). Rigidifying patterns (11) are formed on the protruding bosses. An article produced using such a template is also described.

Description

TITLE: FORMER FOR USE IN THE MANUFACTURE OF FIBREGLASS ARTICLES
TECHNICAL FIELD
In the manufacture of all kinds of sheet-like articles or articles having sheet-like portions it is commonplace to stiffen the article, or portions of the articles as the case may be, by means of ribs applied to one or both sides thereof. The present invention relates to the formation of such stiffening ribs in particular to the formation of hollow stiffening ribs composed of a hard setting synthetic plastics material such as polyester resins, epoxy resins, vinyl esters or the like, preferably with reinforcing fibres, for example, glass, carbon, plastic or natural fibres, embedded in the resinous or plastics material.
Articles of fibre reinforced plastics material, including hollow stiffening ribs thereof, may be made by "laying up", that is to say by placing a layer of woven or non-woven reinforcing fibres upon a mould surface and then painting or impregnating that layer with the hard-setting plastics material while in a liquid or pasty state and subsequently allowing or causing the plastics to set. Alternatively, a mixture of unset resin and short fibres may be applied to the mould surface in one operation. BACKGROUND ART
Hitherto, hollow stiffening ribs of the kind under discussion have been made by applying bulky, low strength, ropes of paper, wooden slats or other cheap former elements, to one side of a sheet-like article or article portion and subsequently covering those elements with a layer of the settable rib material which sets and becomes bonded to the main body of the sheet intermediate the elements, but is held away from the main body by the elements so constituting filled or hollow ribs.
While the above described method of providing stiffening ribs is generally satisfactory, it is not entirely so, primarily because of the difficulty of holding the former elements in position relative to each other, especially if it is desired to run stiffening ribs in two directions substantially at right angles to each other. These other methods substantially increase the weight and/or cost of the product.
One method of overcoming these problems has been to use a former comprising a foraminous sheet in which the areas between adjacent holes comprise a grid of spaced apart, arch-sectioned longitudinal members and spaced-apart, arch-sectioned transverse members and said members being integrally united at the respective intersection points.
Though this method provides a great improvement over previous arrangements it still has several disadvantages. In order to produce the arch-sectioned members used in this known method the material used to make the former must be substantially rigid and have sufficient mechanical strength to support a layer of settable plastics material. A distinct disadvantage of known formers, when applied to the production of shaped articles having complex curves, is their lack of flexibilty and inability to follow the complex curves without losing or distorting the original designed shape and losing their effectiveness. DISCLOSURE OF THE INVENTION
The present invention seeks to overcome or at least ameliorate these disadvantages by providing a former which is flexible and can be made from thin light material that will maintain its designed shape whilst contorting to a simple or compound curve.
According to the first aspect, the present invention provides a former adapted to support the layer of settable plastics material while it sets into hollow reinforcing ribs bonded to a laid up article of fibre reinforced plastics material during manufacture of said article comprising a foraminous sheet wherein the region of the sheet between each pair of neighbouring holes is elevated above the plane in which the rims of the holes are disposed by means of one or more upstanding formations joined to one another by a flexible web. For preference the upstanding formations are provided with generally level lands lying parallel to the plane of the sheet. Preferably, the upstanding formations are joined at their bases but may be connected at any level between the formations. For preference, said land is provided with a rigidifying formation. Preferably, the rigidifying formation comprises one or more depressions or patterns of depressions formed in the surface of said land, said depressions arranged to resist flexing of the land transverse thereto. BRIEF DESCRIPTION OF DRAWINGS
Preferred embodiments of the invention will now be described, by way of example only, with reference to the accompanying drawings in which:
Figure 1 is a plan view of a former according to one embodiment of the invention;
Figure 2 is a section view taken on line 2 -2 of Figure 1;
Figure 3 is a section view taken on 3 - 3 of Figure 1;
Figure 4 is an enlarged section view, similar to Figure 2, with the fibreglass laid up;
Figure 5 is an enlarged section view, similar to Figure 3, with the fibreglass laid up;
Figure 6 is an enlarged section view, similar to Figure 5, with the further planar layer of fibreglass applied to a form a sheet;
Figure 7 is a plan view of the filler element shown in Figure 6; and . Figure 8 is a perspective view of the former of Figure 1, illustrating the ability to assume complex curves. DESCRIPTION OF PREFERRED EMBODIMENTS
Referring to Figures 1 to 3, the former according to this embodiment a foraminous sheet 5 formed from an inexpensive mouldable material such as paper mache, fibreglass or plastics material. In this example, the former is converted from a sheet 5 of plastics or film material.
The sheet 5 is pierced by a plurality of holes 6 arranged in an orderly array of intersecting rows and the material of the sheet 5 is formed into a one or more upstanding formations 7 having substantially planar upper surfaces forming lands 8. Each formation 7 is joined to adjacent formations at their bases 9 by a flexible web 10. In order to prevent inward deformation of the lands 8 during the laying up process, the lands 8 are rigidified by a pattern of depressions or grooves 11 formed in the surface of the sheet. The grooves 11 have been found to resist transverse bending or flexing and thus effectively rigidify the lands 8 while still allowing the former to assume complex forming shapes as best shown in Figure 8.
The patterns applied to the lands are preferably symmetrical and repeated so to allow for nesting and overlapping of sheets. This assists in joining fixed sized sheets into any sized sheet required. In joining the former sheets 5 the former sheets may be overlapped at the edges by nesting one row of formations 7 within the upstanding formations on the mating edge of a further sheet. The sheets may equally be merely abutted edge to edge and the laying up process used to form a permanent joint.
As best shown in Figures 4 and 5, when the former is to be used it may be applied to sheet 15 which may be of any suitable material, including fibre reinforced synthetic resin, with the rims of the holes 6 in contact with the sheet 15 and the upstanding formations 7 projecting upwardly therefrom.
A layer of fibre reinforced synthetic resin 16 may then be applied to the exposed surface so as to contact and bond with the sheet 15 through the holes 6. Once these parts of layer 16 which are supported by the formations 7 set, they constitute stiffening ribs on the original sheet 15.
If the former is to be applied to a sheet of sharp or complex curvature, the provision of flexible webs 10 enables the former to be bent as required to follow the curved surface. (See figure 8).
The plastics layers supported or formed on the former according to the invention may also be sandwiched between the sheet 15 and a further sheet 17 as shown in figure 6 to constitute a light weight, rigidifying filling or core for composite panel structures or the like. This further sheet 17 may be preformed of fibre glass reinforced plastic or other sheet material and bonded to sheet 16 prior to sheet 16 becoming set or post laying up sheet 17 in the conventional manner. When applying the further sheet 17 to the structure it may be desirable to prevent sagging or deformation of the sheet into the depression formed by laying up into hole areas 6. To prevent this sagging a filler element 18 may be placed into the depression so as to support the sheet 17.
In this embodiment, the filler element 18 is of stool-like construction, however, any suitable filling element may be used. The filler element of this embodiment may be formed during production of the sheet of the intended location of the holes 6. When the holes are cut out the the filling element is removed. This procedure avoids any unnecessary wastage of material. Further the stool element 19 may be provided with a flat lid 20 which sits on the top of the stool element prevent entry of material into the hollow legs 21 of the stool element.
Materials other than those described above may be used, it being appreciated that the former itself requires very little strength, merely enough to support a thin layer of resinous material, and, even then, only for so long as it is necessary for the resin of that layer to set.
Further, it will be appreciated that the holes in the foraminous sheet may be irregularly or randomly disposed and may be of differing shapes and/or sizes.
It will be apparent to those skilled in the art, that further embodiments of the invention are possible and the invention is not limited to the specific examples described.

Claims

1. A former for supporting a layer of settable plastics material while it sets into hollow reinforcing ribs bonded to a laid up article of fibre reinforced plastics material during manufacture of said article, comprising a foraminous sheet wherein the region of the sheet between each pair of neighbouring holes is elevated above the plane in which the rims of the holes are disposed by means of one or more upstanding formations joined to one another by a flexible web.
2. A former according to claim 1 wherein the upstanding formations are provided with generally level lands lying parallel to the plane of the sheet.
3. A former according to claim 2.wherein the upstanding formations are joined at their bases.
4. A former according to claim 2 or 3 wherein one or more of said lands is provided with a rigidifying formation.
5. A former according to claim 4 wherein said rigidifying formation comprises one or more depressions or patterns of depressions formed in the surface of said land, said depressions arranged to resist flexing of the land transverse thereto.
6. A former according to claim 5 wherein said patterns applied to the lands are symmetrical and repeated so to allow for nesting and overlapping of sheets.
7. A former according to claim 5 wherein said depressions are grooves in the surface of the land.
8. A former according to claim 1 wherein said holes are arranged in an array of rows substantially parallel to the edges of the sheet.
9. An article formed using the former of claim 1.
10. An article according to claim 9 wherein the former of claim 1 is applied to a sheet of material with the rims of the holes in contact with said sheet of material and the upstanding formations projecting upwardly therefrom, a layer of fibre reinforced synthetic resin being applied to an exposed surface of said former so as to contact and bond with said sheet of material through said holes.
11. An article according to claim 10 including a further sheet of material bonded to upstanding areas of said fibre reinforced synthetic resin layer.
12. A former substantially as hereinbefore described with reference to the accompanying drawings.
EP90906063A 1989-04-11 1990-04-10 Former for use in the manufacture of fibreglass articles Expired - Lifetime EP0466784B1 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
AU3640/89 1989-04-11
AUPJ364089 1989-04-11
PCT/AU1990/000139 WO1990011888A1 (en) 1989-04-11 1990-04-10 Former for use in the manufacture of fibreglass articles
PCT/AU1990/000237 WO1990014938A1 (en) 1989-06-01 1990-06-01 Starch derived shaped articles

Publications (3)

Publication Number Publication Date
EP0466784A1 true EP0466784A1 (en) 1992-01-22
EP0466784A4 EP0466784A4 (en) 1992-04-01
EP0466784B1 EP0466784B1 (en) 1995-08-16

Family

ID=3773842

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90906063A Expired - Lifetime EP0466784B1 (en) 1989-04-11 1990-04-10 Former for use in the manufacture of fibreglass articles

Country Status (6)

Country Link
US (1) US5374466A (en)
EP (1) EP0466784B1 (en)
JP (1) JPH085136B2 (en)
AU (1) AU631206B2 (en)
DE (1) DE69021721T2 (en)
WO (1) WO1990011888A1 (en)

Families Citing this family (28)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1994020290A1 (en) * 1993-03-08 1994-09-15 Form-Rite Plastics Developments Pty. Limited Former for core sandwich in composite reinforced plastics
AU680885B2 (en) * 1993-03-08 1997-08-14 Form-Rite Plastics Developments Pty. Limited Former for core sandwich in composite reinforced plastics
US5747142A (en) * 1993-03-08 1998-05-05 Form-Rite Plastics Development Pty., Ltd. Former for core sandwich in composite reinforced plastics
US5487800A (en) * 1994-01-24 1996-01-30 Davidson Textron Inc. Method of making a covered article by vacuum drawing
US5607750A (en) * 1996-01-29 1997-03-04 Liou; Yaw-Tyng Automobile mat
US6481584B1 (en) * 1999-08-16 2002-11-19 Richard W. Cantley Plastic pegboard
US20080190048A1 (en) * 2001-05-30 2008-08-14 Toto, Ltd. Bathroom floor panel
US20070210023A1 (en) * 2005-12-12 2007-09-13 Mower Barry D Peg board
EP2098358A1 (en) * 2008-03-03 2009-09-09 Technische Universiteit Delft Structural panel for engineering applications and method for manufacturig such a structural panel
USD813421S1 (en) 2009-08-28 2018-03-20 Progress Profiles Spa Floor underlayment
US9188348B2 (en) 2009-08-28 2015-11-17 Progress Profiles Spa Method and apparatus for positioning heating elements
US9448002B2 (en) * 2011-12-15 2016-09-20 Ignacio Marc Asperas Snow man making device for making a snow person having light emitting structures
BR112014022086B1 (en) 2012-03-07 2020-12-15 Toyoda Iron Works Co., Ltd INTERIOR COMPONENT LAMINATED COMPOSITE
US8950141B2 (en) * 2012-09-12 2015-02-10 Schluter Systems L.P. Veneer underlayment
EP2792630A1 (en) * 2013-04-16 2014-10-22 Kone Corporation An elevator car and an elevator
JP5893218B2 (en) 2013-05-15 2016-03-30 豊田鉄工株式会社 Stacked composite interior parts
US9160942B2 (en) 2013-07-11 2015-10-13 Canon Kabushiki Kaisha Solid-state imaging sensor, ranging device, and imaging apparatus
CA3073535C (en) 2014-08-18 2021-03-09 Progress Profiles Spa Method and apparatus for positioning heating elements
US10215423B2 (en) 2014-08-18 2019-02-26 Progress Profiles S.P.A. Method and apparatus for positioning heating elements
USD806911S1 (en) 2015-03-17 2018-01-02 Silcart S.P.A. Floor underlayment
DE102016115023A1 (en) * 2015-12-23 2017-06-29 Ensinger Gmbh Spacers for insulating glass panes
US9726383B1 (en) 2016-06-17 2017-08-08 Progress Profiles S.P.A. Support for radiant covering and floor heating elements
US10859274B2 (en) 2016-04-01 2020-12-08 Progress Profiles S.P.A. Support for radiant covering and floor heating elements
USD971449S1 (en) 2016-04-13 2022-11-29 Progress Profiles S.P.A. Floor underlayment
DE202017101349U1 (en) 2017-03-09 2018-06-12 Werner Schlüter isolation mat
USD1036979S1 (en) 2020-04-06 2024-07-30 Progress Profiles S.P.A. Floor underlayment
USD1036242S1 (en) 2020-04-22 2024-07-23 Progress Profiles S.P.A. Floor underlayment
USD1036243S1 (en) 2020-10-09 2024-07-23 Progress Profiles S.P.A. Floor underlayment

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1104490A (en) * 1964-08-10 1968-02-28 Desmond Harold Bleasdale Former for use in the manufacture of fibreglass articles
JPS5911972A (en) * 1982-07-12 1984-01-21 Nissan Motor Co Ltd Reinforcing structure of panel

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US335461A (en) * 1886-02-02 Peedeeick latulip
US3126978A (en) * 1964-03-31 Acoustical and thermal insulation
US2987240A (en) * 1959-06-08 1961-06-06 Du Pont Film
US3352079A (en) * 1965-04-30 1967-11-14 John G Strong Floor form structure
US3438312A (en) * 1965-10-22 1969-04-15 Jean P M Becker Ground covering capable for use in playing tennis in the open air or under cover
US4118261A (en) * 1976-01-06 1978-10-03 Keith Pedler Method for reinforcing sheet material
US4133481A (en) * 1977-12-19 1979-01-09 Bennett Leslie B Anti-skid device for vehicles
US4563374A (en) * 1981-10-19 1986-01-07 Gebr, Happich Gmbh Blow molded decorative or protective strip with temperature compensation
DE3310640A1 (en) * 1983-03-24 1984-09-27 J.F. Adolff Ag, 7150 Backnang FLOOR MAT FOR A FLOORING, PREFERABLY FOR A WATERPROOF ARTIFICIAL GRASS, AND METHOD FOR THEIR PRODUCTION
DE3479597D1 (en) * 1983-03-31 1989-10-05 Monsanto Co Elongated bendable drainage mat
US4577700A (en) * 1984-04-16 1986-03-25 Mobil Oil Corporation Method and system for displacing drilling fluid from a drill string in a well drilling system
US4596731A (en) * 1984-09-17 1986-06-24 Cudmore Warner J G Grass protecting walkway grid
US4695033A (en) * 1985-10-19 1987-09-22 Shin Nihon Kohan Co., Ltd. Modular panel for mold
US4752520A (en) * 1986-12-15 1988-06-21 Builder's Research And Development Corporation Reinforced concrete tile and its method of manufacture
DE3803062A1 (en) * 1988-01-29 1989-08-10 Herbst Donald BENDABLE SHUTTERING FILM

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1104490A (en) * 1964-08-10 1968-02-28 Desmond Harold Bleasdale Former for use in the manufacture of fibreglass articles
JPS5911972A (en) * 1982-07-12 1984-01-21 Nissan Motor Co Ltd Reinforcing structure of panel

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 8, no. 96 (M-294)(1533) 4 May 1984 & JP-A-59 011 972 ( NISSAN JIDOSHA ) 21 January 1984 *
See also references of WO9011888A1 *

Also Published As

Publication number Publication date
AU631206B2 (en) 1992-11-19
EP0466784B1 (en) 1995-08-16
AU5447090A (en) 1990-11-05
JPH085136B2 (en) 1996-01-24
US5374466A (en) 1994-12-20
EP0466784A4 (en) 1992-04-01
WO1990011888A1 (en) 1990-10-18
DE69021721D1 (en) 1995-09-21
DE69021721T2 (en) 1996-01-18
JPH04504389A (en) 1992-08-06

Similar Documents

Publication Publication Date Title
EP0466784A1 (en) Former for use in the manufacture of fibreglass articles.
US3419457A (en) Laminated structure with former element
US3641230A (en) Method for making prestressed laminated fiber glass structures
US3955019A (en) Cuspated sheet forming
JP7502264B2 (en) Method for making a rigid shell for a suitcase, a shell for a suitcase, and a suitcase
US5683780A (en) Modular carpet tile mat construction and process of making same
US20090162579A1 (en) Play surface layer structure
EP0285378A1 (en) Stackable grid material
US5444959A (en) Three-dimensional structural component
US6114014A (en) Floor mat and process for producing the same
US3164110A (en) Composite structural element and method of making the same
US3660215A (en) Deformable fibreglass reinforced supporting element
CA2230193A1 (en) Mat manufacture
US4942712A (en) Roof covering
EP0690784B1 (en) Former for core sandwich in composite reinforced plastics
WO1997011825A2 (en) Fibre reinforced plastic panel
EP0006080B1 (en) a method of manufacturing a laminate
CN101806139B (en) Plastic floor and manufacturing method thereof
EP1371792A1 (en) Formwork made of reinforced foamed material
AU680885B2 (en) Former for core sandwich in composite reinforced plastics
EP0899154A2 (en) Floor mat and process for producing the same
JPS6032970Y2 (en) Elastic board for forming uneven patterns on concrete surface
FR2677063A1 (en) Roof covering or cladding panel. Methods of manufacture and positioning
JPS61171334A (en) Manufacture of frame material for civil work
JP2003328536A (en) Tile unit and method of manufacture and pressure sensitive adhesive sheet for tile unit

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 19911009

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): DE FR GB

A4 Supplementary search report drawn up and despatched

Effective date: 19920211

AK Designated contracting states

Kind code of ref document: A4

Designated state(s): DE FR GB

17Q First examination report despatched

Effective date: 19930819

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE FR GB

REF Corresponds to:

Ref document number: 69021721

Country of ref document: DE

Date of ref document: 19950921

ET Fr: translation filed
PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
REG Reference to a national code

Ref country code: GB

Ref legal event code: IF02

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20020410

Year of fee payment: 13

Ref country code: FR

Payment date: 20020410

Year of fee payment: 13

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20020417

Year of fee payment: 13

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20030410

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20031101

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20030410

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20031231

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST